Mahmoud, M. A., H. S. Abdel-Mohsein, and U. T. Mahmoud. “Effect of Chinese Propolis Supplementation on Ross Broiler Chicks: Microbial Population in Fecal Matter and Litter”. Journal of Advanced Veterinary Research, vol. 4, no. 2, Apr. 2014, pp. 77-84, https://advetresearch.com/index.php/AVR/article/view/76.